action on their own, which seems like wise advice. joining me is pete williams. this is a big development. what's the latest? >> reporter: it is a big development. the pictures don't show crystal clear view of the faces, of course. there's pictures that the fbi has not released. as you noted, they do believe they have images showing the man in the white hat, planting the second bomb, in the one in front of the restaurant. by the way, we have seen that picture from our affiliate whdh in boston that shows the garbage bag next to the mailbox. they say that this is now that that is not the bomb. that the bomb was planted on the other side of that barrier. it's right near there, but just on the other side. in the release of these pictures, then, they have chosen which they think will be most helpful to people in being able to recognize themment granted, the faces are never crystal clear but they hope the totality of the clothes and what they were doing and where they were will cause people to call in. they are getting the response they asked for or getting a response, any way. a lot of names.